diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index cb766413d951c3..64557e4487973a 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -3,7 +3,7 @@ sphinxcontrib-programoutput==0.17
 sphinx_design==0.6.1
 sphinx-rtd-theme==2.0.0
 python-levenshtein==0.25.1
-docutils==0.20.1
+docutils==0.21.2
 pygments==2.18.0
 urllib3==2.2.3
 pytest==8.3.3